Headphoneus Supremus

Not too sure, 9038 Pro consumes as much power as 3x of the 9028 Pro with a little more gain in performances. I don’t think 9038pro is ever intended for Portable player. Neither does 9028pro. These lines are intended for Desktop uses.

There is only so much to cramp into a portable design. One key example is the Battery power DC supply vs Real AC main.